A thermal expansion valve with one-way control function includes a valve body having an inlet passage and an out passage, a temperature sensor installed on one end of the valve body, and a first valve core component installed in an inside chamber of the valve body. The first valve core component includes a first valve core and a valve rod against the temperature sensor. The valve body also includes an accommodation component extending from said the inlet passage into the valve body and coaxially installed with the inlet passage. The accommodation component has a second valve port connected with the inside chamber. The accommodation component has a second valve core component having a supporting piece and a second valve core matching the second valve port. The processing of the structure is convenient and the assembly of the second valve core component is simple and reliable.
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1. A thermal expansion valve with one-way control function, comprising a valve body having an inlet passage and an outlet passage, a temperature sensing component placed at one end of the valve body, and a first valve core component placed in an inner cavity of the valve body, wherein the first valve core component comprises a valve rod abutting against the temperature sensing component, and a first valve core configured to cooperate with a first valve port in the inner cavity to control a flow of fluid medium flowing from the inlet passage to the outlet passage, and the valve body further comprises an accommodating portion extending inwardly to the valve body from the inlet passage, the accommodating portion is provided with a second valve port in communication with the inner cavity, a second valve core component is provided in the accommodating portion; and in a case that the medium flows from the inlet passage to the outlet passage, the second valve port is closed; and in a case that the medium flows from the outlet passage to the inlet passage, the second valve port is opened.
A thermal expansion valve with one-way control has a valve body with an inlet and outlet. A temperature sensor is at one end, and a first valve inside controls flow from inlet to outlet, using a valve rod against the temperature sensor. The inlet extends into the valve body, forming an accommodation for a second valve. This second valve blocks flow from inlet to outlet, but opens if flow reverses from outlet to inlet, providing one-way control. It has a second valve port in communication with the inner cavity, and a second valve core component.
2. The thermal expansion valve according to claim 1 , wherein the inlet passage coaxially extends into the valve body to form the accommodating portion, and the valve rod extends between the accommodating portion and the inlet passage.
The thermal expansion valve, featuring one-way control, has a valve body with an inlet and outlet, a temperature sensor, and a first valve core. The inlet passage extends coaxially into the valve body forming an accommodating portion. The valve rod, which controls the first valve core, extends between this accommodating portion and the inlet passage. The second valve core, which allows flow from outlet to inlet only, is housed within the accommodating portion.
3. The thermal expansion valve according to claim 1 , wherein the accommodating portion is a hole extending inwardly to the valve body from the inlet passage and having a same diameter as the inlet passage, and the second valve port is provided at a bottom of the hole.
The thermal expansion valve, featuring one-way control, has a valve body with an inlet and outlet, a temperature sensor, and a first valve core. The accommodation portion is a hole extending from the inlet into the valve body, matching the inlet's diameter. The second valve port, which allows flow from outlet to inlet only, is at the bottom of this hole, containing a second valve core.
4. The thermal expansion valve according to claim 1 , wherein the second valve core component comprises a supporting member, and a second valve core for cooperating with the second valve port.
The thermal expansion valve, featuring one-way control, has a valve body with an inlet and outlet, a temperature sensor, and a first valve core. The second valve core assembly, residing within the accommodating portion, comprises a supporting member and a second valve core that seals against the second valve port, allowing flow from outlet to inlet.
5. The thermal expansion valve according to claim 4 , wherein the accommodating portion and the inlet passage are arranged to form a stepped hole, and the second valve port is provided at a bottom of the stepped hole.
The thermal expansion valve, featuring one-way control, has a valve body with an inlet and outlet, a temperature sensor, and a first valve core. The accommodating portion and the inlet passage form a stepped hole. The second valve port, which allows flow from outlet to inlet only, is at the bottom of this stepped hole, containing a second valve core and supporting member.
6. The thermal expansion valve according to claim 5 , wherein the supporting member abuts against a stepped surface of the stepped hole.
In the thermal expansion valve with one-way control, where the accommodating portion and inlet form a stepped hole with the second valve port at the bottom and a supporting member and second valve core inside, the supporting member abuts against the stepped surface of the stepped hole, providing support for the second valve.
7. The thermal expansion valve according to claim 3 , wherein the supporting member is fixed by a snap ring.
In the thermal expansion valve with one-way control, where the accommodation portion is a hole matching the inlet, with the second valve port at the bottom and a supporting member and second valve core inside, the supporting member is fixed in place by a snap ring.
8. The thermal expansion valve according to claim 3 , wherein the supporting member is provided with an elastic retaining portion, and the supporting member is retained in the accommodating portion via the elastic retaining portion.
In the thermal expansion valve with one-way control, where the accommodation portion is a hole matching the inlet, with the second valve port at the bottom and a supporting member and second valve core inside, the supporting member has an elastic retaining portion. This elastic portion allows the supporting member to be retained inside the accommodating portion.
9. The thermal expansion valve according to claim 3 , wherein the second valve core is spherical and abuts against the supporting member via a spring.
In the thermal expansion valve with one-way control, where the accommodation portion is a hole matching the inlet, with the second valve port at the bottom and a supporting member and second valve core inside, the second valve core is a spherical ball that abuts against the supporting member using a spring.
10. The thermal expansion valve according to claim 3 , wherein the second valve core comprises a first segment and a second segment, the first segment has an approximately tapered structure, and the second segment has a cylindrical structure for cooperating with a supporting member.
In the thermal expansion valve with one-way control, where the accommodation portion is a hole matching the inlet, with the second valve port at the bottom and a supporting member and second valve core inside, the second valve core has two segments: a tapered first segment and a cylindrical second segment. The cylindrical segment cooperates with the supporting member.
11. The thermal expansion valve according to claim 1 , wherein a communicating hole in communication with the second valve port is provided in the inner cavity at a side adjacent to the outlet passage, and the communicating hole forms an angle with respect to an axis of the outlet passage.
The thermal expansion valve, featuring one-way control, has a valve body with an inlet and outlet, a temperature sensor, and a first valve core. A communicating hole connects to the second valve port inside the valve body at the side near the outlet passage. This communicating hole is at an angle to the axis of the outlet passage.
12. The thermal expansion valve according to claim 1 , wherein the accommodating portion is in communication with the outlet passage via a second communicating passage, the outlet passage and a first communicating passage are arranged in parallel and are in communication with each other, and the outlet passage and the second communicating passage are arranged in parallel and are in communication with each other.
The thermal expansion valve, featuring one-way control, has a valve body with an inlet and outlet, a temperature sensor, and a first valve core. The accommodating portion connects to the outlet passage via a second communicating passage. The outlet passage and a first communicating passage are parallel and connected. The outlet passage and the second communicating passage are also parallel and connected.
13. The thermal expansion valve according to claim 12 , further comprising a connecting pipe welded on the valve body and allowing fluid to flow out, wherein the connecting pipe is in communication with the outlet passage.
The thermal expansion valve, where the accommodating portion connects to the outlet via a second communicating passage, and the outlet and a first communicating passage are parallel and connected, also includes a connecting pipe. This pipe is welded onto the valve body and allows fluid to flow out, and is in communication with the outlet passage.
14. The thermal expansion valve according to claim 13 , wherein a highest surface of an inner hole of the connecting pipe is not lower than a lowest surface of an inner hole of the second communicating passage.
The thermal expansion valve includes a connecting pipe allowing fluid to flow out, where the accommodating portion is in communication with the outlet passage via a second communicating passage, the outlet passage and a first communicating passage are parallel and in communication with each other, and the outlet passage and the second communicating passage are parallel and in communication with each other. The highest point of the inner hole of the connecting pipe is no lower than the lowest point of the inner hole of the second communicating passage.
15. The thermal expansion valve according to claim 12 , further comprising a connecting pipe welded on the valve body and allowing fluid to flow out, wherein the connecting pipe extends to a bottom end of the outlet passage.
The thermal expansion valve includes a connecting pipe allowing fluid to flow out, where the accommodating portion is in communication with the outlet passage via a second communicating passage, the outlet passage and a first communicating passage are parallel and in communication with each other, and the outlet passage and the second communicating passage are parallel and in communication with each other. The connecting pipe extends to the bottom end of the outlet passage.
16. The thermal expansion valve according to claim 14 , wherein a cross section of the first communicating passage has an approximately elliptical structure.
In the thermal expansion valve, where the accommodating portion connects to the outlet via a second communicating passage, and the outlet and a first communicating passage are parallel and connected, the cross-section of the first communicating passage has an approximately elliptical shape.
17. The thermal expansion valve according to claim 1 , wherein a limiting pin rod for limiting an opening operational position of the second valve core component is further provided in the accommodating portion.
The thermal expansion valve, featuring one-way control, has a valve body with an inlet and outlet, a temperature sensor, and a first valve core. A limiting pin rod is placed inside the accommodating portion. This pin limits how far the second valve core component can open.
18. The thermal expansion valve according to claim 17 , wherein the valve body is provided with a guiding hole in communication with the accommodating portion, and the limiting pin rod is fixedly inserted in the guiding hole.
The thermal expansion valve, where a limiting pin rod is inside the accommodating portion to restrict the second valve core's opening, includes a guiding hole in the valve body that connects to the accommodating portion. The limiting pin rod is fixed inside this guiding hole.
19. The thermal expansion valve according to claim 18 , wherein a positioning blind hole is provided at another side wall of the accommodating portion that is axially facing the guiding hole, and an inner end of the limiting pin rod is placed in the positioning blind hole.
The thermal expansion valve, having a guiding hole with a fixed limiting pin rod to restrict the second valve core's opening, also has a positioning blind hole on the opposite side of the accommodating portion, axially facing the guiding hole. The inner end of the limiting pin rod is placed within this positioning blind hole.
20. The thermal expansion valve according to claim 17 , wherein in a projective plane perpendicular to a direction of movement of the second valve core component, a ratio of an area of a portion of the limiting pin rod located in the accommodating portion to an area of the accommodating portion is less than 0.2.
The thermal expansion valve includes a limiting pin rod inside the accommodating portion to restrict the second valve core's opening. The ratio of the area of the limiting pin rod within the accommodating portion to the total area of the accommodating portion is less than 0.2 when viewed in a plane perpendicular to the movement of the second valve core component.
21. The thermal expansion valve according to claim 20 , wherein an elastic component is provided on the limiting pin rod at a position where the limiting pin rod cooperates with the second valve core component.
The thermal expansion valve, with a limiting pin rod inside the accommodating portion where the ratio of the pin's area to the accommodating portion's area is less than 0.2, has an elastic component on the limiting pin rod where it touches the second valve core component.
22. The thermal expansion valve according to claim 20 , wherein the limiting pin rod is arranged in a direction perpendicular to the direction of movement of the second valve core component.
The thermal expansion valve includes a limiting pin rod inside the accommodating portion to restrict the second valve core's opening, where the ratio of the pin's area to the accommodating portion's area is less than 0.2. The limiting pin rod is arranged perpendicular to the direction the second valve core component moves.
23. The thermal expansion valve according to claim 21 , wherein the limiting pin rod is arranged in a direction perpendicular to the direction of movement of the second valve core component.
The thermal expansion valve, having a limiting pin rod with an elastic component and arranged perpendicularly to the movement of the second valve core, restricts the second valve core's opening, where the ratio of the pin's area to the accommodating portion's area is less than 0.2.
24. The thermal expansion valve according to claim 1 , wherein a limiting sleeve is arranged between the valve rod and the valve body, and the limiting sleeve extends inwardly into the accommodating portion to limit an opening operational position of the second valve core component.
The thermal expansion valve, featuring one-way control, has a valve body with an inlet and outlet, a temperature sensor, and a first valve core. A limiting sleeve is arranged between the valve rod and the valve body. This sleeve extends into the accommodating portion to limit the opening of the second valve core.
25. The thermal expansion valve according to claim 24 , wherein a positioning stopping port is provided in the valve body above the first valve port, and is configured to accommodate an inner end of the limiting sleeve, which is protruding out, and the limiting sleeve is provided with a through hole configured to communicate the inlet passage with the accommodating portion.
The thermal expansion valve, with a limiting sleeve between the valve rod and body extending into the accommodating portion, has a positioning stopping port in the valve body above the first valve port. This port receives the protruding inner end of the limiting sleeve, which also has a through-hole connecting the inlet passage to the accommodating portion.
26. The thermal expansion valve according to claim 24 , wherein the valve body is provided with an insertion-type mounting hole at a position corresponding to the first valve port, and the insertion-type mounting hole is configured to accommodate an inner end of the limiting sleeve, which is protruding out, and the first valve port is formed at the inner protruding end of the limiting sleeve, and the limiting sleeve is provided with a through hole configured to communicate the inlet passage with the accommodating portion.
The thermal expansion valve, with a limiting sleeve between the valve rod and body extending into the accommodating portion, features an insertion-type mounting hole in the valve body corresponding to the first valve port. This hole receives the protruding inner end of the limiting sleeve. The first valve port is formed at this protruding end, and the sleeve has a through-hole connecting the inlet passage to the accommodating portion.
27. The thermal expansion valve according to claim 26 , wherein the limiting sleeve has a positioning surface abutting against the valve body at one side of the insertion-type mounting hole, and a first sealing member is arranged between the positioning surface and the valve body.
The thermal expansion valve, having an insertion-type mounting hole that receives the protruding limiting sleeve and forms the first valve port, also includes a positioning surface on the limiting sleeve abutting the valve body on one side of the insertion-type mounting hole. A first sealing member sits between this positioning surface and the valve body.
28. The thermal expansion valve according to claim 25 , wherein a center axis of the through hole is located below a center axis of the inlet passage.
The thermal expansion valve, featuring a limiting sleeve with a through-hole extending into the accommodating portion, and a positioning stopping port in the valve body above the first valve port that receives the protruding limiting sleeve, has the center axis of the through-hole located below the center axis of the inlet passage.
29. The thermal expansion valve according to claim 24 , wherein a second sealing member is arranged between a portion of the valve rod that protrudes out of the limiting sleeve and the valve body.
The thermal expansion valve, featuring a limiting sleeve arranged between the valve rod and the valve body and extending into the accommodating portion to limit the second valve core's opening, includes a second sealing member between the portion of the valve rod that protrudes out of the limiting sleeve and the valve body.
30. The thermal expansion valve according to claim 24 , wherein a third sealing member is arranged between the limiting sleeve and the valve rod, and a fourth sealing member is arranged between the limiting sleeve and the valve body.
The thermal expansion valve, featuring a limiting sleeve arranged between the valve rod and the valve body and extending into the accommodating portion to limit the second valve core's opening, includes a third sealing member between the limiting sleeve and the valve rod, and a fourth sealing member between the limiting sleeve and the valve body.
31. The thermal expansion valve according to claim 30 , wherein an elastic component is provided on the limiting sleeve at a position where the limiting sleeve cooperates with the second valve core component.
The thermal expansion valve, featuring a limiting sleeve with third and fourth sealing members and arranged between the valve rod and the valve body, also has an elastic component on the limiting sleeve where it interacts with the second valve core component.
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November 20, 2012
April 25, 2017
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